Monitor support system

ABSTRACT

A system for providing support and position control of a monitor. In one embodiment, a method of supporting a monitor includes converting an ascending energy storage member force curve into a substantially constant supporting force against the monitor. In one aspect, a method of supporting a monitor includes providing an energy storage member and a cam which are cooperatively positioned so as to move relative to each other along the path of motion. As the energy storage member moves along the path relative to the cam, the cam displaces the energy storage member and thereby changes a force applied by the energy storage member on the cam, and wherein the cam converts the force applied by the energy storage member into a supporting force on the monitor.

TECHNICAL FIELD

The present invention relates generally to supports for computermonitors. More particularly, it pertains to counterbalance andpositioning mechanisms for computer monitors, such as CRTs or flat panelmonitors.

BACKGROUND

Personal computers and/or display monitors are often placed directly ona desk or on a computer case. However, to increase desk space; or torespond to the ergonomic needs of different operators, computer monitorsare sometimes mounted on elevating structures. Alternatively, monitorsare mounted to a surface such as a wall, instead of placing the monitoron a desk or a cart.

However, personal computers and/or display monitors are often used bymultiple operators at different times during a day. In some settings,one computer and/or monitor may be used by multiple people of differentsizes and having different preferences in a single day. Given thedifferences in people's size and differences in their preferences, amonitor or display adjusted at one setting for one individual is highlylikely to be inappropriate for another individual. For instance, a childwould have different physical space needs than an adult using the samecomputer and monitor.

In addition, operators are using computers for longer periods of timewhich increases the importance of comfort to the operator. An operatormay choose to use the monitor as left by the previous user despite thediscomfort, annoyance and inconvenience experienced by a user who usessettings optimized for another individual, which may even result ininjury after prolonged use.

Moreover, as monitors grow in size and weight, ease of adjustability isan important consideration. For monitors requiring frequent adjustment,adjustability for monitors has been provided using an arm coupled withgas springs, where the arm is hingedly coupled with the desk or avertical surface. However, the gas springs are costly and wear out overtime. In addition, the gas springs require a significant amount ofspace, for instance arm length, which can be at a premium in certainapplications, such as in hospitals.

Thus, there is a need for a monitor support mechanism which is compact,less costly to manufacture and maintain, has increased reliability,allows easy adjustability, is scalable to many different sized monitors,is adaptable to provide a long range of travel, and is adaptable toprovide constant support force as the monitor is being positioned.

SUMMARY

Accordingly, the present inventors devised methods, systems, andmechanisms for providing force and position control on a monitor. In thepresent description, “vertical,” “horizontal,” “lateral,” “up,” “down,”“raised,” “lowered,” and the like are meant to be taken in theirrelative sense in regards to the position of the mechanism in thefigures and the context of the description, and they are not to be takenin their absolute sense.

In one embodiment, a method of supporting a monitor includes convertingan ascending energy storage member force curve into a substantiallyconstant supporting force against the monitor.

In one aspect, a method of supporting a monitor includes providing anenergy storage member and a cam which are cooperatively positioned so asto move relative to each other along the path of motion. As the energystorage member moves along the path relative to the cam, the camdisplaces the energy storage member and thereby changes a force appliedby the energy storage member on the cam, and wherein the cam convertsthe force applied by the energy storage member into a supporting forceon the monitor.

One aspect provides a monitor support mechanism. In one embodiment, amonitor support mechanism includes an energy storage member and a cam.The energy storage member and the cam are cooperatively positioned sothat, as the energy storage member moves along a path relative to thecam, the cam displaces the energy storage member and thereby changes aforce of the energy storage member, and wherein the cam converts theforce of the energy storage member into a substantially constantsupporting force on the monitor.

During use of the mechanism, for example, the height, location, and/orhorizontal position of a component mounted on the mechanism can beadjusted. For example, to move the monitor, a portion of the truck orthe monitor is grasped, and force is applied to overcome the frictionalrestraint of the components, which can be as little as 1 or 2 pounds, byway of example. When the moving force is removed, the component remainssupported in its new position. Thus, even very large loads can be safelyand easily adjusted with a minimum of effort.

Moreover, in one embodiment, a constant level of energy is stored (orexpended) by the energy storage member per unit of movement along thepath. This provides ease of adjustment all along the path.

Among other advantages, the present monitor support system providesmechanisms which can be compact, scalable, have a long range of travel,and have a slim profile. In addition, the monitor support mechanisms arelow cost and light weight. A further benefit is when multiple componentsare simultaneously secured with the same mechanism to achieve anefficient use of space and provide common movement of the components. Inone embodiment, a single mechanism can be changed or adjusted to allowvarious weight components to be counterbalanced by the same mechanism.

These and other embodiments, aspects, advantages, and features of thepresent system will be set forth in part in the description whichfollows, and in part will become apparent to those skilled in the art byreference to the following description of the invention and referenceddrawings or by practice of the invention. The aspects, advantages, andfeatures of the invention are realized and attained by means of theinstrumentalities, procedures, and combinations particularly pointed outin the appended claims and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a back view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 1B is a side view of the monitor support system of FIG. 1A.

FIG. 2 is a flow chart of a method for supporting a monitor according toone embodiment.

FIG. 3A shows a front view of the monitor support mechanism of FIG. 1A.

FIG. 3B shows a front view of a monitor support mechanism constructed inaccordance with one embodiment.

FIG. 3C is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 3D is a side view of the monitor support mechanism of FIG. 3C.

FIG. 4A is a perspective view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 4B is a front view of the monitor support mechanism of FIG. 4A.

FIG. 5A is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 5B is a side view of the monitor support mechanism of FIG. 5A.

FIG. 6 is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 7 is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 8A shows a front view of a monitor support mechanism constructed inaccordance with one embodiment.

FIG. 8B shows a side view of the monitor support mechanism of FIG. 8A.

FIG. 9A shows a front view of a monitor support mechanism constructed inaccordance with one embodiment.

FIG. 9B shows a top view of the monitor support mechanism of FIG. 9A.

FIG. 10 is a perspective view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 11 A shows a schematic view of a mechanism constructed inaccordance with one embodiment.

FIG. 11B is another view of the mechanism of FIG. 11A.

FIG. 12A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 12B is a side view of an adjustable band of the mechanism of FIG.12A.

FIG. 13A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 13B is another view of the mechanism of FIG. 13A.

FIG. 13C shows an isometric view of the cams of the mechanism of FIG.13A.

FIG. 14A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 14B is another view of the mechanism of FIG. 14A.

FIG. 15 shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 16 is another view of the mechanism of FIG. 15.

FIG. 17 shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 18 shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 19A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 19B is another view of the mechanism of FIG. 19A.

FIG. 20 shows a perspective view of a mechanism constructed inaccordance with one embodiment.

FIG. 21A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 21B is another view of the mechanism of FIG. 21A.

FIG. 22A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 22B is another view of the mechanism of FIG. 22A.

FIG. 23A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 23B is another view of the mechanism of FIG. 23A.

FIG. 24A shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 24B shows a schematic view of a mechanism constructed in accordancewith one embodiment.

FIG. 24C shows a perspective view of a rail for a mechanism inaccordance with one embodiment.

FIG. 25 shows a curved support for a mechanism according to oneembodiment.

FIG. 26 shows a mechanism having an adjustment mechanism according toone embodiment.

FIG. 27 shows a mechanism having an adjustment mechanism according toone embodiment.

FIG. 28 shows a mechanism having an adjustment mechanism according toone embodiment.

FIG. 29 shows a mechanism having an adjustment mechanism according toone embodiment.

FIG. 30 is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 31A is a front view illustrating a monitor support mechanismconstructed in accordance with one embodiment.

FIG. 31B is a side view of the monitor support mechanism of FIG. 31A.

FIG. 32 is a front view illustrating a furniture support mechanismconstructed in accordance with one embodiment.

FIG. 33A is an isometric view illustrating a furniture support mechanismconstructed in accordance with one embodiment.

FIG. 33B is an isometric view illustrating a furniture support mechanismconstructed in accordance with one embodiment.

FIG. 34 is a perspective view illustrating an exercise machineconstructed in accordance with one embodiment.

FIG. 35 is a perspective view illustrating an exercise machineconstructed in accordance with one embodiment.

FIG. 36A shows a graph depicting an energy storage member force curveaccording to one embodiment.

FIG. 36B shows a compression rate curve in accordance with oneembodiment.

FIG. 37A shows a graph depicting an energy storage member force curveaccording to one embodiment.

FIG. 37B shows a compression rate curve in accordance with oneembodiment.

DETAILED DESCRIPTION

In the following detailed description, reference is made to theaccompanying drawings which form a part hereof, and in which is shown byway of illustration specific embodiments in which the invention may bepracticed. These embodiments are described in sufficient detail toenable those skilled in the art to practice the invention, and it is tobe understood that other embodiments may be utilized and that structuralchanges may be made without departing from the scope of the presentinvention. Therefore, the following detailed description is not to betaken in a limiting sense, and the scope of the present invention isdefined by the appended claims and their equivalents. As noted above, inthe present description, “vertical,” “horizontal,” “lateral,” “up,”“raised,” “lowered,” and the like are meant to be taken in theirrelative sense in regards to the position of the monitor supportmechanism in the figures and the context of the description, and theyare not to be taken in their absolute sense.

Overview of System

In one or more embodiments, the present monitor support system providescontrol for the motion of a monitor in any direction or axis; provides aconstant force along a range of travel; provides a variable force orother pre-determined force along the range of travel; is adaptable to awide variety of applications; is scalable both as to size and forcecapacity; is usable in many different attitudes; is optionallyadjustable; moves a load in a linear direction; moves a load in a3-dimensional or other predetermined direction; and is adaptable toutilize a broad range of springs.

In general, the present system includes a method which utilizes energystored in a spring which is released in the form of an ascending forcecurve as a result of the deflection of the spring. This force curve isconverted to a constant force, and/or a variable force, and/or otherpre-determined force by cams having a profile designed to control therate of spring deflection (or compression) for each unit of travel overa range of travel.

FIGS. 1A and 1B show a rear and side view, respectively, of oneexemplary use of a monitor support mechanism 10 constructed according toone embodiment of the present invention.

As shown in FIG. 1A, a flat screen monitor 2 is attached to a portion ofa movable carriage or truck 4 of monitor support mechanism 10, which iscoupled to a base 6. Truck 4 is movable relative to base 6 so thatmonitor 2 can move up and down relative to base 6. In this embodiment,base 6 is stationary and truck 4 moves up and down. It will be notedthat mechanism 10 and the other mechanisms described below can alsoprovide support if the monitor is coupled to the base and the truck isstationary, such as mounted to a wall.

Although further details will be described below, monitor supportmechanism 10 generally includes a cam 12, an energy storage member, suchas spring 14, an energy storage/cam interface member, such as camfollower 16, and a guide 18 which defines a path of motion for monitor2. In this example, the direction of the path defined by guide 18provides a linear motion in a vertical direction. As will be discussedbelow, other embodiments provide for a horizontal direction of motion.Other attitudes between horizontal and vertical are also within thescope of the present system. Moreover, some embodiments provide a3-dimensional, curved axis of motion.

Generally, the members of monitor support mechanism 10 are cooperativelypositioned so that, as monitor 2 travels along guide 18, cam 12 causesspring 14 to either increase or decrease its stored energy level. Cam 12then converts this energy into a substantially constant supporting forceon truck 4 via cam follower 16. Advantageously, this configurationprovides for a compact, elegantly designed mechanism since the cam movesrelative to the spring, directly displaces the spring, and converts thespring energy into a lifting and/or supporting force.

In one embodiment, cam 12 includes a cam surface or profile which isgenerally vertically oriented and generally faces towards the pathdefined by guide 18. In this embodiment, the cam surface is a varyingdistance away from the path while not intersecting the path. In one ormore embodiments, this cam surface orientation helps provide a scalabledesign since the monitor support mechanism as shown can be lengthened orshortened in the vertical direction without having to expand laterallyor be made thicker. Advantageously, this increases the available rangeof travel for the monitor. It is noted that, as used herein, verticallyoriented does not mean that the whole cam surface is vertical, it meansthat relative to a lateral or horizontal orientation, the surface ismore vertical that horizontal and that it has a generally up/downprofile as opposed to a lateral profile.

In this embodiment, cam 12 has a cam shape or profile relative to thepath of motion so that the profile corresponds directly to the amount ofenergy from the spring required to provide a counterbalance to themonitor. Accordingly, energy is stored in the energy storage member asthe monitor descends along the path of motion. This stored energy isthen used to help lift the monitor as it ascends. Thus, when the springforce is weak, the compression rate is high, and as the spring forcegets stronger, the compression rate is slowed down for each unit ofdescent along the cam. By changing the rate of spring compression, thecam converts the ascending force curve of the spring into a constant orpre-determined level of supporting force which is applied in thedirection of motion of the monitor. As used herein, supporting forcerefers to a force which acts either directly or indirectly against theweight of an object.

In other words, an ever-increasing force applied by the spring againstthe cam surface is converted by the cam surface into a reaction forceagainst the cam follower. In this embodiment, the reaction forceincludes a first reaction force component parallel to the direction ofthe path and a second reaction force component which is generallyperpendicular to the first reaction force component. These first andsecond reaction force components vary depending on the slope of the camsurface.

In this embodiment, the shape of the cam surface is designed to keep thevertical, supporting force component constant even as the perpendicularforce component increases or decreases. Thus, the shape of the camsurface, in combination with the spring, provides a constant supportingforce against truck 4 during movement of truck 4 and monitor 2.

In other embodiments, the other monitor support mechanisms to bediscussed below can be used in place of monitor support mechanism 10,and variations on the cam and energy storage members discussed above arepossible and are considered within the scope of the present system aswill be discussed below.

FIG. 1B shows that in one embodiment, a pivot 3 is disposed between flatscreen monitor 2 and the truck of monitor support mechanism 10, suchthat the flat screen monitor 2 is allowed to rotate or pivot relative tothe truck of the monitor support mechanism, and the truck is allowed tomove vertically relative to the support of the monitor support mechanism10. As FIG. 1B shows, in one embodiment, monitor support mechanism 10 isrelatively thin, and thus the monitor may be positioned close to a wallwhich can save desk space or work station space.

Method and System

FIG. 2 shows a diagram of a method 20 according to one embodiment of thepresent monitor support system. Method 20 includes, in a block 22,providing an energy storage member and a cam. In one embodiment, the camand energy storage member are positioned so as to move relative to eachother along the path of motion. The energy storage member, such as aspring, has a force and a stored energy level which ascend as the springtravels along the path relative to the cam. As the energy storage membermoves along the path relative to the cam, the cam displaces the energystorage member and thereby increase the energy stored in the member andcauses a change in the force applied by the energy storage member on thecam. In one embodiment, the ascending spring force is applied generallyperpendicular to the direction of the path. In one embodiment, thespring force is applied in a non-parallel direction relative to thepath.

In block 24, the cam converts the spring energy into a first reactionforce component and a second reaction force component. In thisembodiment, the first reaction force component is parallel to thedirection of motion axis and supports the weight of the monitor, whilethe second reaction force component is perpendicular to the firstreaction force component.

In one embodiment, the cam profile is curved and runs generallyalongside the path of motion in a vertical orientation. In oneembodiment, the cam surface lies at varying distances away from the pathwhile not intersecting the path of motion. In one embodiment, the springforce is applied directly against the cam surface.

In block 26, method 20 includes varying the energy of the spring as thespring and cam move relative to each other, wherein the first reactionforce component is at one or more predetermined force levels as thespring force varies along the curved cam surface. In one embodiment, theone or more pre-determined force levels comprise a substantiallyconstant force level. In other embodiments, the one or morepre-determined force levels are a variable force level. In oneembodiment, block 26 includes varying the second reaction forcecomponent while maintaining the first reaction force componentsubstantially constant as the load travels along a direction of motionaxis.

In various embodiments, blocks 22-26 are combined and/or some blocks maybe omitted. For instance in one embodiment, a method includes providing,in combination, a force member for applying an ascending force as a loadmoves along a direction of motion and a cam having a profile which, incombination with the chosen force member, exerts a substantiallyconstant supporting force on the monitor.

In some embodiments, the method includes coupling the energy storagemember and cam to a first member, such as a truck or carriage, and asecond member, such as a base or a wall, respectively. The first memberand second member are movably coupled to each other so that onetranslates within the other in a path defining the direction of motion.As the first member travels along the second member, the energy storagemember is compressed (or expanded) either directly or indirectly by thecams and is compressed at a rate controlled by the shape or profile ofthe cams. For instance, in one embodiment, the method provides for aconstant force on the monitor. Thus, a cam profile is chosen whichprovides that as the force applied by the spring increases, the forceapplied on the monitor remains substantially constant.

Referring to FIGS. 36A and 36B, a pair of graphs are shown depictingexemplary spring force graphs in accord with one or more embodiments ofthe present system. FIG. 36A shows a typical force curve 3 for aconventional compression spring. The vertical axis of graph 36A showsspring force and the horizontal axis shows spring compression. Thespring has the following characteristics: 4-inch free length, 2-inchmaximum compression, a force rate of 44 lbs/inch, and a maximum force of87 lbs. The spring is merely an example and in no way is meant to limitthe present embodiment. It is noted that the spring compression shownalong the horizontal axis refers to spring compression after a pre-loadcompression of a ½ inch is applied to the exemplary spring. This ismerely exemplary, and other pre-loads are within the scope of thepresent system.

Graph 36B depicts a spring compression rate along the vertical axis anda distance along the path of motion axis along the horizontal axis. Inone embodiment, a compression rate curve 5 is provided by a cam having aprofile substantially similar to the curve 5 and having a cam profileshape that controls the rate of spring compression as a function ofdistance along the horizontal axis. In this example, the spring iscompressed 1-½ inches over a 5 inch travel range. In combination, thecompression rate of FIG. 36B applied to the spring curve 3 of FIG. 36Aresults in the substantially constant axial force curve 4 depicted inFIG. 36A. It will be appreciated that the present design is scalable andthat horizontal axis of graph 36B can be extended to provide for furthertravel of an energy storage member along a path of motion.

FIG. 37A-37B show graphs depicting exemplary spring force graphs inaccord with another embodiment of the present system. FIGS. 37A-37B showa method of providing a variable force along an axis of motion.

FIG. 37A shows a spring curve 14. FIG. 37B shows a varying compressionrate curve 14. In one embodiment, curve 14 can result from utilizing twoor more springs having different spring rates. In other embodiments,curve 14 results from a cam having a profile with varying slopes andarcs along its surface. In combination, the compression rate of FIG. 37Bapplied to the spring curve 14 of FIG. 37A results in the variable axialforce curve 12 depicted in FIG. 37A.

Additional Embodiments

The method and system described above can be embodied in various monitorpositioning and support mechanisms.

FIG. 3A shows further details of monitor support mechanism 10 of FIG.1A. Monitor support mechanism 10 generally includes a first section 301,and a second section 302 which is slidably coupled to the first sectionalong a direction of motion axis α which defines the path of motion. Asdiscussed above, axis α can be vertical, angled horizontal, and3-dimensional in various embodiments. First section 301 includes atleast one cam 320. Second section 302 includes at least one cam follower355, an energy storage member 14, such as a tension spring, and truck 4,which is movable along axis α of first section 301. As shown in FIG. 1A,a monitor is mountable to truck 4.

In this embodiment, cam 320 has a generally vertical orientation andgenerally faces the path of motion while spring 14 has a generallyhorizontal orientation relative to the path. This configuration helpsprovide for a relatively long range of travel of the two members withrespect to each other since the spring can travel a great distancevertically while only expanding a relatively small distance laterally.Moreover, this configuration provides that the spring is expanded as itdescends the path of motion so that it stores energy, and this storedenergy is then converted into a lifting force as it ascends the path.

Monitor support mechanism 10, in one embodiment, includes two arms 360,362. Each of the two arms 360, 362 extends from a proximal end 352 to adistal end 354, where cam follower 355 provides an interface between thecam 320 and energy storage member 14. Thus, as a load moves along axis αrelative to cam 320, the cam pushes against cam follower 355 and expandsspring 14, which causes an increase in the energy level and force levelof the spring.

In this embodiment, each of the two arms 360, 362 is adapted to pivot athinge points 358 about the proximal end 352, where the proximal end 352is rotatably coupled with the truck 4. For example, the proximal end 352includes a bore 353 therethrough, and disposed within the bore 353 is amechanical fastener. The fastener and the bore 353 are sized to allowthe arm 360, 362 to rotate freely about the fastener. In onealternative, the fastener and the bore 353 are sized to frictionallyengage arm 360 or 362. The amount of frictional engagement can be variedto change the amount of force necessary to move the monitor. Frictionprovides stability for supporting a component and control when adjustingor moving the component. In one embodiment, a frictional force ofapproximately 2.5 pounds is provided. Depending on use of mechanism 10,and material incorporated therein, the frictional force can rangeaccordingly.

Truck 4 is coupled to cam followers 355 via arm members 360, 362, andthe truck is adapted to move along guide 392, which defines themonitor's path of motion and which is collinear with axis a. Truck, asused herein, includes the portion of the monitor support mechanism whichcouples to the load. In some embodiments, this includes a movablecarriage, or any portion of the monitor support mechanism that coupleswith the load and moves along the guide 392.

In one embodiment, guide 392 comprises a track 394, which optionallyincludes a plurality of tracks. In one embodiment, track 394 is a drawerslide. The track 394 can be secured to the support 310, or the track 394is integral with the support 310. For instance, track 394 can include atleast one cut out within the support 310, which allows a portionextending from the truck 390 to ride therein. Alternatively, in anotheroption, track 394 includes one or more track supports disposed therein,further facilitating translation of the truck 4. In yet anotherembodiment, guide 392 comprises a projection which is received by aportion of truck 4, and truck 4 is adapted to slide along the projectionof guide 392.

Disposed between the two arms 360, 362 is the energy storage member suchas spring 14. In one embodiment, spring 14 comprises at least onetension or expansion spring or other ascending force member. As usedherein, an ascending force member is a member which increases its storedforce (energy) as it is compressed or tensioned. Other types ofascending force members may be suitable for use with the monitor supportmechanism 10, such as, but not limited to, torsion springs, gas springs,or compression springs. In this embodiment, spring 14 is oriented sothat its force becomes stronger as it descends along the path relativeto the cam and so that its force is directed generally normally orperpendicularly against the cam surface. Spring 14 is adapted to storeenergy and provide force to support a load from a weight-bearingcomponent, such as a monitor, which is mounted on the truck 4.

In one embodiment, spring 14 is disposed adjacent to the distal end 354of the two arms 360, 362. The spring 14 is mechanically retained to thetwo arms 360, 362, for example, by a mechanical component, or a bondedtype of joint, such as a welded joint.

In one embodiment, cam 320 is coupled with a support 310. Cam 320includes a cam surface 322, on which cam follower 355 rides, as furtherdiscussed below. The cam surface 322, in one embodiment, generally has acurved profile. The cam surface 322 is derived as described above inFIGS. 36A-37B.

In one embodiment, the monitor support mechanism 10 includes two opposedcams 324, 326, each having a cam surface 322, and defining distances 323a and 323 b between axis α and the two opposed cam surfaces of cams 324,326, respectively. The cam surface 322 of the two opposed cams 324, 326extend from a first upper end 328 to a second lower end 330, where thecam surface 322 is generally curved from the first upper end 328 to thesecond lower end 330. The cam surface 322 is shaped, in one embodiment,such that the distances 323 a and 323 b gradually increase from theupper end 328 to the second lower end 330.

In one embodiment, cam surface 322 is shaped so that the distances 323 aand 323 b change at a relatively rapid rate at the upper end 328 of thecam and gradually decrease to a relatively lower expansion rate as thetruck descends to the lower end 330 of the cam. This rate changecorresponds directly to the amount of energy from the spring required toprovide a counterbalance to a monitor on the truck. Thus, when thespring force is weak, the expansion rate is high, and as the springforce gets stronger, the expansion rate is slowed down for each unit ofdescent along the cam. By changing the rate of spring expansion, aconstant or pre-determined level of force is applied parallel to thedirection of axis α.

Thus, in one embodiment, the shape of cam surface 322 changes the rateof spring compression (or expansion) to provide a counterbalance forcein the direction of motion. This changing rate of compression (orexpansion) converts the ascending force curve of spring 14 into aconstant force which is applied in the direction of motion. In otherwords, a force applied by the spring against the cam surface isconverted by the cam surface into a reaction force against cam follower355. In one embodiment, the reaction force includes a first reactionforce component in the direction of the axis of motion a (herein calledthe axial force component), and a second reaction force component whichis generally perpendicular to the first reaction force component (hereindescribed as the perpendicular component). These first and secondreaction force components vary depending on the slope of the camsurface.

In one embodiment, the shape of the cam surface is designed to keep theaxial force component constant even as the perpendicular force componentincreases or decreases. Thus, the shape of cam surface 322, incombination with the spring 14, provides a constant axial force againsttruck 4 during movement of the truck and monitor in the axial (here,vertical) direction. In another embodiment, the shape of cam surface 322in combination with the spring, provides a constant horizontal forceduring horizontal translation of the truck.

In one embodiment, exemplary cam surface 322 of the present embodimentprovides an exemplary compression rate curve 5 of graph 36B. Thiscompression rate results in the constant axial force curve 4 of graph36A. Other embodiments provide variable, pre-determined forces alongvarying attitudes of travel, as depicted and described above regardingFIGS. 37A-37B. For instance, in some embodiments, the cam surfacesprovide varying axial forces over the axial length of the cam. Forinstance, upper portion 328 of cam surface 322 could be shaped toprovide for supporting a 20 lb. load, and lower portion 330 could beshaped to provide for supporting a 15 lb. load, or vice versa.

Variations on the cams discussed above are possible and are consideredwithin the scope of the invention. For instance, the opposed cams 324,326 can have different slopes, or slope in a different or opposite slopethan that described above. In some embodiments, as will be discussedbelow, only a single cam is provided. In some embodiments, inward facingcams are utilized and the energy storage member is a compression spring.In other embodiments, more than one spring is utilized to provide avarying spring rate. Other embodiments include torsion springs androtating cams.

The relative size of the components, such as the guide 392 and the truck14, is modifiable such as to affect the amount of frictional force whichoccurs as the guide 392 and the truck 14 are moved relative to oneanother. The frictional force will change the amount of force necessaryto move the truck 14, and any component mounted thereto. In theexemplary embodiment, truck 14 and guide 392 are adapted to provide aminimum of frictional force between the guide and the truck, consistentwith the amount of “pause” or manual force a designer would want theuser to exert in order to move a stationary, counterbalanced load.Typically, there is enough natural friction within the other componentsof the monitor support mechanism to stabilize the load.

Advantageously, in the present embodiment and in some other embodimentsdiscussed below, the moving components of monitor support mechanism 10(i.e., the pivot arms, the spring, the truck, the cam followers) areconnected to each and move in the same general plane of motion. Thisprovides that monitor support mechanism 10 can be manufactured to be arelatively thin mechanism.

In one embodiment, by changing the spring location or the distancebetween the cam surfaces, further details of which will be discussedbelow, one can change the force provided by the system. This providesthat a user can mount monitors of varying size and weight on themechanism over its life without having to replace the mechanism itself.Moreover, a manufacture can manufacture a mechanism of a single size andthen adjust the single mechanism to fit a wide range of monitors withouthaving to retool the assembly line.

For instance, in one embodiment, each of the two arms 360, 362 includesa spring hub or other attachment means which is adapted to retain thespring component 14 thereon. In the case of an adjustable mechanism, thecam surface is curved to provide maximum expected counterbalance, andload weight adjustments are made by changing the position of the springcomponent along arms 360 and 362 to increase or decrease the momentlength (the length between the spring force and the pivot point 353).For instance, in one embodiment this is accomplished by moving a springhub or other attachment means up or down along arms 360 and 362 to thevarious connection points.

Alternatively, in one embodiment a load weight adjustment can beaccomplished by changing the spacing between the cam surfaces, detailsof which will be discussed below. For instance, either or both cams 324and 326 could be coupled to support 310 so that a user could move thecam in a horizontal or lateral direction either in towards axis α oraway from the axis. By moving the cam, the user would change thegeometry of the system accordingly, which in turn would affect the forcesupplied by spring 14.

In some embodiments, the cam, truck, or other portion of mechanism 10 isconnected to a motor which provides the moving force. Advantageously,since the present system utilizes the energy which is stored in thespring during its downward movement along the path to help lift themonitor as it ascends, the present system requires a user to onlyovercome a small frictional force to move even large monitors. Thus, aninexpensive small-load motor can be provided to move the monitor. In oneembodiment, a button is provided to actuate the motor.

In some embodiments, monitor support mechanism 10 includes one or moreof the features of other mechanisms described below. Accordingly, thedetails and features described in the other embodiments are incorporatedherein by reference.

FIG. 3B shows a monitor support mechanism 10′ according to oneembodiment of the present invention. Monitor support mechanism 10′generally includes a first section 301′, and a second section 302′ whichis slidably coupled to the first section along a motion of directionaxis α so as to define a path of motion. As discussed above, axis α canbe vertical, angled, horizontal, and 3-dimensional in variousembodiments. First section 301′ includes a cam 320′. Second section 302′includes a cam follower 355′ attached to the end of an arm 350′, anenergy storage member 370′, such as a tension spring, and a truck 390′,which is translatable along axis α of first section 301′.

Monitor support mechanism 10′ is substantially similar to monitorsupport mechanism 10 and the discussion above is incorporated herein byreference. Monitor support mechanism 10′ includes a single cam insteadof a pair of opposing cams.

FIGS. 3C and 3D illustrate a front and side view of a monitor supportmechanism 380 according to one embodiment. One or more aspects ofmechanism 380 are similar to mechanism 10 and will be omitted for thesake of clarity. In one embodiment, mechanism 380 includes a firstsection 381 a guide groove 382 and cams 383 integral therewith. A secondsection 389 of mechanism 380 includes one or more guide members 387attached to a truck 386 for guiding the truck along groove 382. One ormore arms 384 are coupled to truck 386 and have cam followers 385attached to a distal end of the arms. An energy storage member, such astension spring 388 is attached to each of arms 384 to force camfollowers 385 against cam surfaces 383.

Referring to FIG. 3D, in this embodiment arm 384 bifurcates at itsdistal end and two springs 388 are utilized in mechanism 380. Thisprovides support and balance for the mechanism.

In one embodiment, one or more of first section 381, truck 386, arms384, cam followers 385, and/or spring 388 are made from a non-metallicmaterial. For instance, in one embodiment first section 381 is aninjection molded plastic member with groove 382 and cam 383 integrallymolded with the body as one section. Likewise truck 386 can be injectionmolded. In various embodiments, the members are made from variousplastics, plastic composites, polymers, fiberglass, and othernon-metallic materials. In one embodiment, spring 388 is a fiberglasscomposite material. Advantageously, using such non-metallic materialprovides a lightweight, low-cost, mass producible mechanism.

Monitor support mechanism 10′ generally includes a first section 301′,and a second section 302′ which is slidably coupled to the first sectionalong a motion of direction axis α so as to define a path of motion. Asdiscussed above, axis ax can be vertical, angled, horizontal, and3-dimensional in various embodiments. First section 301′ includes a cam320′. Second section 302′ includes a cam follower 355′ attached to theend of an arm 350′, an energy storage member 370′, such as a tensionspring, and a truck 390′, which is translatable along axis α of firstsection 301′.

Monitor support mechanism 10′ is substantially similar to monitorsupport mechanism 10 and the discussion above is incorporated herein byreference. Monitor support mechanism 10′ includes a single cam insteadof a pair of opposing cams.

FIG. 4A shows a monitor support mechanism 400 according to oneembodiment.

Monitor support mechanism 400 generally includes a first section 401 anda second section 402. Second section 402 is slidably coupled to firstsection 401 along a path of motion defining a direction of motion axisα. In one embodiment, the direction of motion is a linear motion in avertical direction. Other embodiments provide for a horizontal directionof motion. Other attitudes between horizontal and vertical are alsowithin the scope of the present system. Moreover, some embodimentsprovide a 3-dimensional axis of motion. First section 401 includes atleast one cam 420. Second section 402 includes at least one arm 450, anenergy storage member 470, such as a compressive spring, and a truck490, which moves along axis α of first section 401.

In this embodiment, cam 420 has a generally vertical orientation andgenerally faces the path of motion while energy storage member 470 has agenerally horizontal orientation relative to the path. Thisconfiguration helps provide for a relatively long range of travel of thetwo members with respect to each other since the spring can travel agreat distance vertically while only compressing a relatively smalldistance laterally.

Cam 420 works in conjunction with a cam follower 455 attached to arm450. Disposed at the distal end 434 of arm 450, cam follower 455, suchas a bearing, is adapted to ride on cam 420. In various embodiments, camfollowers 455 are wheels. In some embodiments, the cam follower is thedistal portion of arm 450 riding directly against the cam surface.

In one embodiment, the at least one cam 420 is coupled with a support410. The at least one cam 420 includes a cam surface 422, on which theat least one arm 450 rides, as further discussed below. The cam surface422, in one embodiment, generally has a curved profile. Optionally, camsurface 422 includes multiple cam profiles. The cam surface 422 isderived, as described above regarding FIGS. 36A-37B.

In one embodiment, the monitor support mechanism 400 includes twoopposed cams 424, 426, each having a cam surface 422, and definingdistances 423 a and 423 b between axis α and the two opposed cams 424,426, respectively. The cam surface 422 of the two opposed cams 424, 426extends from a first upper end 428 to a second lower end 430, where thecam surface 422 is generally curved from the first upper end 428 to thesecond lower end 430. The cam surface 422 generally faces towards axis αand is a varying distance away from the axis while not intersecting theaxis. In one or more embodiments, this helps to provide a scalabledesign since the monitor support mechanism as shown can be lengthened orshortened in the axial direction without having to expand laterally orhave additional supporting members added to the system.

The cam surface 422 is shaped, in one embodiment, such that thedistances 423 a and 423 b gradually decrease from the upper end 428 tothe second lower end 430. Optionally, the cam surface 422 is adapted toadjust the load on the energy storage member 470 as the energy storagemember 470 becomes more compressed.

In one embodiment, cam surface 422 is shaped so that the distances 423 aand 423 b change at a relatively rapid rate at the upper end 428 of thecam and gradually decrease to a relatively lower compression rate as thetruck descends to the lower end 430 of the cam.

Thus, in one embodiment, the shape of cam surface 422 changes the rateof spring compression to provide a counterbalance force on a monitor inthe direction of motion of the monitor.

Similarly to mechanism 10, in one embodiment, the shape of the camsurface 422 is designed to keep the axial (here, vertical) forcecomponent constant even as the perpendicular force component increasesor decreases. Thus, the shape of cam surface 422, in combination withthe energy storage member 470, provides a constant axial force againsttruck 490 during translation of the truck and monitor in the axialdirection.

In one embodiment, the shape of cam surface 422 in combination with theenergy storage member 470, provides a constant horizontal force duringhorizontal translation of the truck. For instance in one embodiment,exemplary cam surface 422 of the present embodiment provides anexemplary compression rate curve 5 of graph 36B. This compression rateresults in the constant axial force curve 4 of graph 36A. Otherembodiments provide variable, pre-determined forces along varyingattitudes of travel, as depicted and described above regarding FIGS.37A-37B. For instance, in some embodiments, the cam surfaces providevarying axial forces over the axial length of the cam. For instance,upper portion 432 of cam surface 422 could be shaped to provide forsupporting a 20 lb. load, and lower portion 434 could be shaped toprovide for supporting a 15 lb. load, or vice versa.

In one embodiment, monitor support mechanism 400, includes two movablearms 450 such as arms 460, 462. Each of the two arms 460, 462 extendsfrom a proximal end 452 to a distal end 454. Each of the two arms 460,462 is adapted to pivot at hinge points about the proximal end 452,where the proximal end 452 is rotatably coupled with the truck 490. Forexample, the proximal end 452 includes a bore 453 therethrough, anddisposed within the bore 453 is a mechanical fastener 456. The fastener456 and the bore 453 are sized to allow each arm 460, 462 to rotatefreely about the fastener 456. In one alternative, the fastener 456 andthe bore 453 are sized to frictionally engage the arms 460, 462. Theamount of frictional engagement can be varied to change the amount offorce necessary to move the monitor support mechanism. For example,friction provides stability for supporting a component, and control whenadjusting or moving the component. In the exemplary embodiment, africtional force of approximately 2.5 pounds is provided. Depending onuse of monitor support mechanism 400, and material incorporated therein,the frictional force can range accordingly.

Disposed between the two arms 460, 462 is the force or spring component470. In one option, the spring component 470 is disposed adjacent to thedistal end 454 of the two arms 460, 462. The spring component 470 ismechanically retained to the two arms 460, 462, for example, by amechanical component, or a bonded type of joint, such as a welded joint.Optionally, each of the two arms 460, 462 includes a spring hub 464which can be attached at either connection points 465, 466, or 467 alongarms 460 and 462. Spring hub 464 is adapted to retain the springcomponent 470 thereon.

In one embodiment, the monitor support mechanism 400 is an adjustableforce mechanism. In the case of an adjustable mechanism, the cam surface422 is curved to provide a maximum expected counterbalance, and loadweight adjustments are made by changing the position of the springcomponent along arms 460 and/or 462 to increase or decrease the momentlength (the length between the spring force and the pivot point 453).For instance, in one embodiment this is accomplished by moving springhub 464 up or down along arms 460 and 462 to the various connectionpoints 465, 466, or 467. The connection points shown are exemplary andfewer or more may be provided on the arms 460 and 462.

Alternatively, in one embodiment, a load weight adjustment can beaccomplished by changing the spacing between the cam surfaces. Thus,either or both cams 424 and 426 could be coupled to support 410 so thata user could move the cam in a horizontal direction either in towardsaxis α or away from the axis. By moving the cam, the user would changethe geometry of the system accordingly, which in turn would affect theforce supplied by energy storage member 470.

Advantageously, in the present embodiment and in other embodimentsdiscussed above and below, the moving components of monitor supportmechanism 400 (i.e., the pivot arms, the spring, the truck, the camfollowers) are connected to each and move in the same general plane ofmotion. This provides that monitor support mechanism 400 can bemanufactured to be a relatively thin mechanism.

Referring to FIGS. 4A and 4B, in one exemplary use of monitor supportmechanism 400, the position of a monitor can be adjusted. In thisexample, the monitor would be moved in a vertical direction, otherembodiments, to be discussed below, move the monitor along a horizontalpath, a path angled between vertical and horizontal, a curved path, andother paths having 1, 2, 3, dimensions and having 1, 2, or 3 degrees offreedom.

One method, for example, includes coupling pivot members 460 and 462 athinge points 453 on a truck 490, each pivot member 460 and 462 extendingfrom a proximal end 452 at the hinge points 453 to a distal end 454. Acompression spring 470 is disposed between the pivot members 460 and462, where the compression spring 470 is disposed adjacent to the distalends 454 of the pivot members 460 and 462. In addition, a cam follower455 is disposed on the distal end 434 of each of the pivot members 460and 462. In various embodiments, the cam follower includes a bearing, awheel, and a slide with, for example, a coating thereon.

The truck 490 is movably coupled with an axial guide 492 and coupled tothe load, such as a flat screen monitor. To move the monitor, a portionof the truck 490 or the monitor is grasped, and force is applied toovercome the frictional restraint of the components of the mechanism,which can be around 2.5 pounds, by way of example. (The friction iseasily adjustable by tightening or loosening various components or usingdifferent elements having a given frictional component). As each camfollower 455 slides against a cam surface 422, the compression spring470 becomes either compressed, as shown in FIG. 4A, or expands, as shownin FIG. 4B, for example.

In the exemplary embodiment, cam surface 422 is shaped so that the forceapplied by truck 490 on the load is approximately equal to the force ofthe load itself all along the axial range of the cam. Thus, wherever theload is positioned along guide 492, it is balanced. To move the load,such as a component, the frictional restraint must be overcome, butwherever the load is finally moved to it will then be balanced again.Thus, large and small loads are easily and smoothly adjustable using thepresent system. In other embodiments, a pre-determined variable forcecan be achieved by changing the cam profile and/or the type of spring.

In some embodiments, mechanism 400 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 5A and 5B illustrate a monitor support mechanism 500 in accordwith one embodiment. FIG. 5A shows a front view and FIG. 5B shows a sideview of monitor support mechanism 500. The monitor support mechanism 500generally includes a first section 501 and a second section 502. Secondsection 502 is slidably coupled to the first section along a path ofmotion defined by a direction of motion axis a. In this embodiment,motion axis α is a linear, vertical axis. Other embodiments include ahorizontal axis and an axis somewhere between vertical and horizontal.Some embodiments have a 3-dimensional axis. First section 501 includes acam 520. Second section 502 includes a cam follower 555 coupled to anarm 550, and a truck 590, which is translatable along axis α of firstsection 501. Arm 550 is secured to the truck 590 and the arm itselfcomprises an energy storage member such as a flat spring. The distal end570 of the spring component or arm 550 resists movement thereto. Thespring component provides the spring force applied by cam follower 555to the cam 520. The spring component is adapted to provide energy tocounterbalance a load from a component, such as a monitor, which ismounted on the truck 590.

Cam 520 is coupled with a support 510. The cam 520 includes a camsurface 522, on which the distal end 570 of the arm 550 rides. The camsurface 522, in one embodiment, generally has a curved profile. In oneembodiment, the cam surface 522 is shaped to provide for a balancing offorces, as discussed above.

The cam surface 522 of the cam extends from a first upper end 528 to asecond lower end 530, where the cam surface 522 is generally curved fromthe first upper end 528 to the second lower end 530. The cam surface 522is shaped, in one embodiment, such that a distance 523 between the camsurface and the axis α gradually increases from the upper end 528 to thesecond lower end 530. In one embodiment, cam surface 522 provides aconstant force in the axial direction axis a. In another embodiment, thesurface provides a pre-determined variable force along the axis α.

In one embodiment, cam surface 522 is shaped so that the distance 523changes at a relatively rapid rate at the upper end 528 of the cam andgradually decreases to a relatively lower rate as the truck descends tothe lower end 530 of the cam. This rate change corresponds directly tothe amount of energy from the spring required to provide acounterbalance to a load on the truck. Thus, when the flat spring forceis weak, the deflection rate is high, and as the spring force getsstronger, the deflection rate is slowed down for each unit of descentalong the cam. By changing the rate of flat spring deflection, aconstant or pre-determined level of force is applied by the spring alongaxis α via the cam.

Thus, the shape of cam surface 522 changes the rate of flat springdeflection to provide a counter force to a load. This changing rate ofdeflection converts the ascending force curve of spring component 550into a constant force in one embodiment. Other embodiments provide avariable force. Thus, the cam surface 522 in combination with the energystorage member or flat spring arm 550, provides a pre-determined forcein the motion of direction during movement of the truck along thatdirection of motion. In general, other details of the profile shape ofcam surface 522 are the same as cam surface 322, as discussed above andincorporated herein by reference.

The cam 520 works in conjunction with the arm 550. Disposed at thedistal end 570 of arm 550 is a cam follower, such as a portion of theend of the arm, a bearing, or wheel 555 which is adapted to ride on cam520. In one embodiment, the monitor support mechanism 500 includes twoopposed cams, each having a cam surface 522.

The truck 590 is adapted to translate along a guide 592. In oneembodiment, the guide 592 comprises the outer perimeter of the sides ofsupport 510. In other embodiments, a track, such as a drawer glide canbe secured to the support, or be integral with the support.

In one embodiment, monitor support mechanism 500 includes a knob 560 orother forcing member which-can be used to vary the pre-load on springcomponent 550. Knob 560 can be tightened to increase the pre-load on thespring and thus provide for a higher final weight load, or it can beloosened to provide for a lower weight load.

In some embodiments, mechanism 500 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 6 shows a monitor support mechanism 600 according to oneembodiment. Monitor support mechanism 600 generally includes a firstsection 601 and a second section 602. Second section 602 is slidablycoupled to the first section along a path of motion defining a linearaxis a. First section 601 includes a cam 620. Second section 602includes a truck 690 which is translatable along motion of directionaxis α of first section 601 along a guide 680.

In one embodiment, cam 620 includes a cam arm 650, which is rotatablycoupled to a support 610 and has a cam surface 622. In one embodiment,the monitor support mechanism 600 includes two opposed cams 624, 626,each having a cam surface 622, and defining distances 623 a and 623 bbetween axis α and the two opposed cam surfaces 624, 626, respectively.The cam surfaces 622 of the two opposed cams 624, 626 are generallycurved from the first upper end 628 to the second lower end 630. The camsurface 622 is shaped, in one embodiment, such that the distances 623 aand 623 b gradually decrease from the upper end 628 to the second lowerend 630.

An ascending energy storage member, such as a tension spring 670, iscoupled to the cam and forces cam 620 into contact with a cam followersuch as wheel 655 on truck 690.

Generally, cam surface 622 has a profile analogous to cam surface 322 ofmonitor support mechanism 10. Tension spring 670 of monitor supportmechanism 600 provides an analogous axial force via cams 624 and 626 asthe expansion spring 14 of monitor support mechanism 10. Other detailsof monitor support mechanism 600 are substantially similar to the othermonitor support mechanisms discussed herein and operates by generallythe same principles, and the descriptions above are incorporated hereinby reference.

In this embodiment, the movement of truck 690 down axis α causes camfollowers 655 to force cams 624 and 626 to rotate accordingly. As thecams (or cam) rotate, energy storage member or spring 670 is stretchedand the energy storage member provides an opposing force to the actionof the cam followers. The spring force is converted by the cam surfaceinto vertical (axial) and horizontal (perpendicular) components. In oneembodiment, the shape of the cam surfaces is adapted so that the axialcomponent force of the cams on cam followers 655 is constant as thetruck translates up and down guide 680, even as the perpendicularcomponent of the force changes. In one embodiment, the shape of the camsurfaces is adapted so that the axial component force of the cams on camfollowers 655 is variable as the truck translates up and down guide 680,even as the perpendicular component of the force changes.

In some embodiments, mechanism 600 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 7 shows a monitor support mechanism 700 according to oneembodiment. Monitor support mechanism 700 generally includes a firstsection 701, and a second section 702 which is slidably coupled to thefirst section along a path of motion which defines a direction of motionaxis α. As discussed above, axis α can be vertical, angled, horizontal,and 3-dimensional in various embodiments. Second section 702 includes acam 720 and a truck 790, which is translatable along axis α of firstsection 701.

In this embodiment, cam 720 includes a pair of outward facing camsurfaces 722 a and 722 b, located a varying distance 723 a and 723 bfrom axis α, respectively. A force member 770, such as a tension spring,is coupled at either end to a pair of cam followers such as wheels orbearings 755. The cam followers are coupled to movable members 756 whichare slidably coupled within cam follower guides 760. In one embodiment,guides 760 are generally horizontally oriented as shown in FIG. 7. Inone embodiment, the guides are angled downward at an orientationgenerally normal to the cam surface of cam 720. These are shown asguides 760′. Force member 770 forces wheels 755 into contact with camsurface 722. As truck 790 is translated up and down axis α, cam surfaces722 a and 722 b force wheels 755 to translate within guide member 760,thus changing the compression or tension in force member 770. In oneembodiment, a guide such as a track is used to keep cam 720 in astraight, axial position.

In one embodiment, cam surface 722 is curved so that the distances 723 aand 723 b change at a relatively rapid rate at a first lower end 728 ofthe cam and gradually decrease to a relatively lower rate as the truckmoves to a second upper end 730 of the cam. This rate change correspondsdirectly to the amount of energy from the spring required to provide acounterbalance to a load on the truck. Thus, when the spring force isweak, the spring expansion rate is high, and as the spring force getsstronger, the spring expansion rate is slowed down for each unit ofascent of the cam. By changing the rate of flat spring expansion, aconstant or pre-determined variable level of vertical (or other axial)force is applied by the spring along axis α via the cam, even as thehorizontal (or other perpendicular) force component increases ordecreases.

In one embodiment, one or more members of mechanism 700 are plastics,polymerics, or other non-metallic composite materials. In someembodiments, another cam such as cam 790 is mounted to the back side ofsection 701 and the cams are coupled together. This helps providestability and guide the cams as they move.

In some embodiments, monitor support mechanism 700 includes one or moreof the features of other mechanisms described above and below.Accordingly, the details and features described in the other embodimentsare incorporated herein by reference.

FIGS. 8A and 8B show a front and side view respectively of a monitorsupport mechanism 800 according to one embodiment. Monitor supportmechanism 800 generally includes a first section 801, and a secondsection 802. Second section 802 is slidably coupled to the first sectionalong a path of motion which defines a direction of motion axis a, androtatably coupled around an axis β. As discussed above, axis α can bevertical, angled, horizontal, and 3-dimensional in various embodiments.First section 801 includes a cam 820. Second section 802 includes aforce member such as torsion bar spring 870, and a truck 890, which istranslatable along axis α of first section 801 along a guide such astrack 810.

In this embodiment, cam 820 includes a cam surface 822 which lies in agenerally circular or curved position around axis β, which in thisembodiment is parallel to the motion of direction axis a. Force member870 forces cam followers such as wheels 855 into contact with camsurface 822. As truck 890 is translated up and down axis α, cam surface822 forces wheels 855 to rotate around axis β, thus changing the tensionin force member 870.

In one embodiment, cam surface 822 is shaped so that the spring tensionrate changes at a relatively rapid rate at a first upper end 828 of thecam and gradually decreases to a relatively lower rate as the truckmoves to a second lower end 830 of the cam. This rate change correspondsdirectly to the amount of energy from the torsion spring required toprovide a counterbalance to a load on the truck. Thus, when the springforce is weak, the spring tension rate is high, and as the spring forcegets stronger, the spring tension rate is slowed down for each unit ofascent of the cam. In one embodiment, by changing the rate of springexpansion, a constant or predetermined level of vertical or other axialforce is applied by the spring along axis β via the cam, even as thehorizontal force component increases or decreases.

In general, other details of the profile shape of cam surface 822, andother details of monitor support mechanism 800 are the same as other camsurfaces and monitor support mechanisms discussed above, which areincorporated herein by reference.

FIGS. 9A and 9B show a front and top view respectively of a monitorsupport mechanism 900 according to one embodiment. Monitor supportmechanism 900 generally includes a first section 901, and a secondsection 902 which is slidably coupled to the first section along a pathof motion which defines a linear axis α. First section 901 includes acam 920. Second section 902 includes a force member such as coil spring970, and a truck 990, which is translatable along axis α of firstsection 901.

In this embodiment, cam 920 includes a cam surface 922 which lies in acurved configuration around axis a. As discussed above, axis α can bevertical, angled, horizontal, and 3-dimensional in various embodiments.Force member 970 forces cam followers 955 into contact with cam surface922. As truck 990 is translated up and down axis α along a guide member910, cam surface 922 forces cam followers 955 to rotate around axis a,thus changing the tension in force member 970. In one embodiment, theshape of surface 922 provides that the spring applies a constant axialcomponent force on the cam followers 955 (and truck 990) via the camsurface. In one embodiment, the shape of surface 922 provides that thespring applies a pre-determined variable axial component force on thecam followers 955 (and truck 990) via the cam surface.

In some embodiments, monitor support mechanism 900 includes one or moreof the features of other mechanisms described above and below.Accordingly, the details and features described in the other embodimentsare incorporated herein by reference.

FIG. 10 shows a monitor support mechanism 1000 according to oneembodiment. Monitor support mechanism 1000 generally includes one ormore of the features discussed herein regarding other embodiments ofmonitor support mechanisms, and those discussions are incorporatedherein by reference. In this embodiment, monitor support mechanism 1000includes a truck 1090, arms 1060, cams 1020, and a gas spring 1070,which supplies the stored energy force for the system.

FIGS. 11A and 11B show a generally schematic representation of amechanism 1100 according to one embodiment. Mechanism 1100 includes acarriage or truck 1102 and an energy storage member 1104. In thisembodiment, energy storage member 1104 includes a first member 1104 aand a second member 1104 b. The members 1104 a and 1104 b of energystorage member 1104 are attached at one end to a base 1106.

As can be seen referring to FIGS. 11A and 11B, truck 1102 moves relativeto energy storage member 1104 along a path defined by an axis α. As thetruck moves, cam followers 1108 and 1110, which are a fixed distanceapart, force the energy storage members 1104 a and 1104 b to bend ordeflect inward. This motion increases the force that the members 1104 aand 1104 b apply to cam followers 1110 and 1108, respectively. The camfollowers then support truck 1102. The degree of bend in arms 1104 a and1104 b defines how much of the energy and force stored in the arms istransferred to cam followers 1108 and 1110. In some embodiments, camfollowers 1108 and 1110 and arms 1104 a and 1104 b are configured toprovide a constant supporting force on truck 1102 as the truck travelsup and down axis a. In some embodiment, a pre-determined variable forceis provided.

In one embodiment, a supplement spring 1120 is positioned betweenmembers 1104 a and 1104 b. This can help increase the overall force ofthe mechanism. Advantageously, members 1104 a and 1104 b act as bothtruck guides and as energy storage members in this embodiment. Thisprovides for a compact mechanism.

In various embodiments, members 1104 a and 1104 b have different shapesdepending on their use. For instance, in one embodiment, each member isapproximately one or two inches wide and generally has a rectangularcross section. In one embodiment, each member is approximately fourinches wide. In one embodiment, the members have a thicker bottom andare tapered as they reach the top, thus having a trapezoidalcross-section.

In some embodiments, mechanism 1100 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 12A and 12B show a generally schematic representation of amechanism 1200 according to one embodiment. Mechanism 1200 includes acarriage or truck 1202, an energy storage member 1204, and a combinationbase/cam 1206. A monitor 1208 is coupled to truck 1202 which movesrelative to cam 1206 along a path of movement defined by an axis α. Inthis embodiment, energy storage member 1204 is attached to truck 1202and includes one or more arms 1210 which increase in force and energy asthey move down along the cam surface. Cam followers 1212 are attached toone end of each of arms 1210 and are forced against the surface of cam1206 by energy storage member 1204.

As truck 1202 moves relative to cam 1206 along axis a, the energy inmember 1204 increases. In one embodiment, the shape of the cam 1206provides a constant supporting force in the direction parallel to axisa. This provides that a user can easily move monitor 1208 up and downthe path of motion of axis α by merely overcoming the frictional forceof the components. Some embodiments provide a pre-determined variableforce. In one embodiment, base/cam 1206 is shaped to provide the shapeshown in three-dimensions. This provides that monitor 1208 can berotated and still be supported by the cam surface.

FIG. 12B shows one embodiment of energy force member 1204 having anadjustable band 1214 positioned around the arms 1210 of the member. Band1214 provides a counter-force as the arms 1210 try to spread apart. Thisprovides that a user can adjust the supporting force of mechanism 1200depending on the weight or load applied against it.

In one embodiment, the cam of mechanism 1200 can be inverted. In otherwords, the cam surface can be within the base, and energy storage member1204 would ride within the base and exert its force outwards.

In one embodiment, energy storage member 1204 includes a rollingexpansion spring which moves relative to cam 1206 along axis a. In oneembodiment, energy storage member 1204 includes integrated ball bearingswhich provide rotation motion around the cam. This provides that a loadcan be rotated and still be supported by the cam surface.

In some embodiments, mechanism 1200 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 13A, 13B, and 13C show a generally schematic representation of amechanism 1300 according to one embodiment. Mechanism 1300 includes acarriage or truck 1302 coupled with an energy storage member 1304, suchas flat spring arms 1310, and coupled to one or more guide rollers 1308.Mechanism 1300 also includes a pair of cams 1306 and 1307 arranged in ascissors cam configuration. Cams 1306 and 1307 provide inward facing,generally vertically oriented cam surfaces. The surfaces overlap eachother and axis α. This provides a compact configuration while stillpermitting a long range of travel for the truck In this embodiment, theone or more guide rollers 1308 guide the truck 1302 along a path ofmotion defining an axis of motion α. A monitor or other load can becoupled to truck 1302. The truck 1302 moves relative to cams 1306 and1307 along axis α. In this embodiment, arms 1310 increase in force andenergy as they move down along the cam surface. Cam followers 1312 areattached to one end of each of arms 1310 and are forced against thesurface of cams 1306 and 1307 by energy storage member 1304. The camsurfaces convert the force and energy of the energy storage member intoa supporting force.

As truck 1302 moves along axis a, (see FIG. 13B), the energy in member1304 increases. In one embodiment, the shape of the cams provides aconstant supporting force in the direction parallel to axis cc. Someembodiments provide a pre-determined variable force.

FIG. 13C shows an isometric view of cams 1306 and 1307 according to oneembodiment.

In some embodiments, mechanism 1300 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 14A and 14B show a generally schematic representation of amechanism 1400 according to one embodiment. Mechanism 1400 includes acarriage or truck 1402, an energy storage member 1404 such as flatspring arms 1410 a and 1410 b, and two sets of cam followers 1412-1415which are attached to truck 1402.

The cam followers are attached to truck 1402 and remain a fixed distanceapart from each other as the truck moves down along a path of motionwhich defines an axis α. In one embodiment, arms 1410 a and 1410 b actas both axis guides for the truck and as energy storage members.

Arms 1410 a and 1410 b are attached at one end to a base 1420. As can beseen referring to FIGS. 14A and 14B, as the truck moves, the camfollowers force arms 1410 a and 1410 b to bend or deflect outward. Thismotion increases the force that the arms 1410 a and 1410 b apply to thecam followers 1412-1415. The cam followers then support truck 1402. Thedegree of bend in arms 1410 a and 1410 b defines how much of the energyand force stored in the arms is transferred to the cam followers. Insome embodiments, cam followers 1412-1415 and arms 1410 a and 1410 b areconfigured to provide a constant supporting force on truck 1402 as thetruck travels up and down axis α. In some embodiment, a predeterminedvariable force is provided. The cam surfaces convert the force andenergy of the energy storage member into a supporting force.

In some embodiments, mechanism 1400 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 15 and 16 show a generally schematic representation of a mechanism1500 according to one embodiment. Mechanism 1500 includes a carriage ortruck 1502, an energy storage member 1504 such as flat spring arms 1510a and 1510 b, and cam followers 1506 and 1508 which are attached totruck 1502.

The cam followers are attached to truck 1502 and remain a fixed distanceapart from each other as the truck moves down along a path of motionwhich defines an axis α.

Arms 1510 a and 1510 b are attached at one end to a base 1520. As can beseen referring to FIGS. 15 and 16, as the truck moves, the cam followersforce arms 1510 a and 1510 b to deflect outward. This motion increasesthe force the arms 1510 a and 1510 b apply to the cam followers 1504 and1506. The cam followers then support truck 1502. The degree ofdeflection in arms 1510 a and 1510 b defines how much of the energy andforce stored in the arms is transferred to the cam followers. In someembodiments, cam followers 1506 and 1508 and arms 1510 a and 1510 b areconfigured to provide a constant supporting force on truck 1502 as thetruck travels up and down axis α. In some embodiment, a pre-determinedvariable force is provided. The cam surfaces convert the force andenergy of the energy storage member into a supporting force.

In some embodiments, mechanism 1500 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 17 shows a generally schematic representation of a mechanism 1700according to one embodiment. Mechanism 1700 includes a carriage or truck1702, a first energy storage member 1704, a second energy storage member1705, and cams 1706. Truck 1702 moves relative to cams 1706 along a pathof movement defined by an axis a. In this embodiment, energy storagemember 1704 is a compression spring and is attached to a lower part ofarms 1710 of truck 1702. Energy storage member 1705 is an extensionspring attached to an upper end of the arms. Cam followers 1712 areattached to one end of each of arms 1710 and are forced against thesurface of cam 1706 by energy storage member 1704 and 1705.

As truck 1702 moves relative to cam 1706 along axis α, the cam causesthe energy in member 1704 to increase. The cam surface then convertsthis energy into a supporting force. In one embodiment, the shape of thecam 1706 provides a constant supporting force in the direction parallelto axis α. Some embodiments provide a predetermined variable supportingforce. Mechanism 1700 is similar in many respects to mechanism 400 inFIGS. 4A and 4B except mechanism 1700 includes angled arms 1710 and apair of springs 1704 and 1705.

In some embodiments, mechanism 1700 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 18 shows a generally schematic representation of a mechanism 1800according to one embodiment. Mechanism 1800 includes a carriage or truck1802 which includes arms 1814, an energy storage member 1804, and a cam1806 which includes a pair of generally vertically oriented inwardfacing surfaces. Truck 1802 moves relative to cam 1806 along a path ofmovement defined by an axis a. Truck 1802 includes an upper portionshaped to receive energy storage member 1804.

In this embodiment, energy storage member 1804 includes a generallyM-shaped (or W-shaped) plastic spring which is positioned within anupper portion of truck 1802. Energy storage member 1804 includes one ormore arms 1810 which decrease in force and energy as the truck andspring move down relative to the cam surface. One or more cam followers1812 are attached to one end of each of arms 1810. Energy storage member1804 applies an outward force on arms 1814 which in turn apply anoutward force on cam followers 1812, which ride along the cam surfacesof cam 1806. In one embodiment, cam followers 1812 are slides whichslide along the cam surface. The frictional force between the slides andthe cam surface can be designed to provide a proper amount of pause orcontrol in the mechanism.

As truck 1802 moves relative to cam 1806 along axis a, the energy inmember 1804 decreases. However, the shape of the cam surfaces of cam1806 converts that energy into a first, supporting force parallel toaxis α and a second force perpendicular to the first force. In oneembodiment, the shape of the cam 1806 provides a constant supportingforce in the direction parallel to axis a. This provides that a user caneasily move a load up and down the path of motion of axis a by merelyovercoming the frictional force of the components. Some embodimentsprovide a pre-determined variable force.

In one embodiment, energy storage member 1804 includes extendingportions 1818 which mate with corresponding cut-outs in truck 1802. Thisallows member 1804 to be oriented either upwards or downwards. In otherwords, member 1804 can have either a W-shaped orientation 1804 b or anM-shaped orientation 1804 a. These different orientations change thespring force supplied by the energy storage member and allow a user toadjust the mechanism.

In one embodiment, essentially the entire mechanism 1800 is made fromplastic or polymer components. For instance, one or more of cam 1806,truck 1802, cam followers 1812, and/or spring 1804 are made from anon-metallic material. For instance, in one embodiment cam 1806 is aninjection molded plastic member. Likewise truck 1802 can be injectionmolded. In various embodiments, the members are made from variousplastics, plastic composites, polymers, fiberglass, and othernon-metallic materials. In one embodiment, spring 1804 is a fiberglasscomposite material. Advantageously, using such non-metallic materialprovides a lightweight, low-cost, mass producible mechanism.

In some embodiments, mechanism 1800 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 19 shows a generally schematic representation of a mechanism 1900according to one embodiment. Mechanism 1900 includes a carriage or truck1902, an energy storage member 1904, and a pair of cams 1906 and 1907arranged so that cam 1906 includes one or more outward facing camsurface, while cam 1907 provides one or more inward facing cam surfaces.Each of the cam surfaces includes a generally vertically oriented camsurfaces relative to a path defined by a direction of motion axis α.

In this embodiment, one or more cam followers 1910 are coupled to truck1902 and forced against cam 1907. One or more cam followers 1912 arealso attached to truck 1902 and ride along cam 1906. In one embodiment,cam followers 1912 are attached at one end of a pivoting arm 1918 of thetruck while cam followers 1910 are attached to the other end of arm1918. The cam followers help to guide the truck as it moves relative tocams 1906 and 1907 along axis α. A monitor or other load can be coupledto truck 1902. In this embodiment, energy storage member 1904 includesan expansion spring and is attached to truck 1902 generally between arms1918 above the pivot point of arm 1918. Energy storage member 1904increases in force and energy as the truck and energy storage membermove down along the cam surface. The cam surfaces convert the force andenergy of the energy storage member into a supporting force. In oneembodiment a compression spring 1905 is positioned between arms 1918below the pivot points of arms 1918.

As truck 1902 moves along axis α, (see FIG. 19B), cams 1906 and 1907cause the energy in member 1904 to increase. Cams 1906 and 1907 thenconvert the energy storage member force into a first force in adirection parallel to axis a and a second force perpendicular to thefirst force. In one embodiment, the shape of the cams provides aconstant, supporting, first force in the direction parallel to axis cc.Some embodiments provide a predetermined variable force.

In some embodiments, mechanism 1900 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 20 shows an isometric representation of a mechanism 2000 accordingto one embodiment. Mechanism 2000 includes a carriage or truck 2002, anenergy storage member 2004 such as a steel spring, and a cam 2006. Truck2002 and energy storage member 2004 move relative to cam 2006 along apath of movement defined by an axis α. In this embodiment, energystorage member 2004 is integral with truck 2002 and includes arms 2010which increase in force and energy as they move down along the camsurface. Cam followers 2012 are attached to one end of each of arms 2010and are forced against the surface of cam 2006 by energy storage member2004.

As truck 2002 moves relative to cam 2006 along axis a, the energy inmember 2004 increases. In one embodiment, the shape of the cam 2006provides a constant supporting force in the direction parallel to axisα. This provides that a user can easily move a monitor or other load upand down the path of motion of axis α by merely overcoming thefrictional force of cam follower 2012 against the cam surface. Someembodiments provide a pre-determined variable force.

In some embodiments, mechanism 2000 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 21A and 21B show a generally schematic representation of amechanism 2100 according to one embodiment. Mechanism 2100 includes acarriage or truck 2102 and an energy storage member 2104. In thisembodiment, energy storage member 2104 includes a first member 2104 aand a second member 2104 b coupled to a base 2106.

As can be seen referring to FIGS. 21A and 21B, truck 2102 moves relativeto energy storage member 2104 along a path defined by an axis α. As thetruck moves, cam followers 2108 and 2110, which are a fixed distanceapart, force the energy storage members 2104 a and 2104 b to bend ordeflect inward. This motion increases the force the members 2104 a and2104 b apply to cam followers 2110 and 2108, respectively. The camfollowers then support truck 2102. The degree of bend in arms 2104 a and2104 b defines how much of the energy and force stored in the arms istransferred to cam followers 2108 and 2110. In some embodiments, camfollowers 2108 and 2110 and arms 2104 a and 2104 b are configured toprovide a constant supporting force on truck 2102 as the truck travelsup and down axis α. In some embodiment, a predetermined variable forceis provided. In various embodiments, members 2104 a and 2104 b can havedifferent shapes depending on their use. In one embodiment, members 2104a and 2104 b have inwardly sloping sides as shown in FIG. 21A.

In one embodiment, essentially the entire mechanism 2100 is made fromplastic or polymer components. For instance, one or more of energystorage member 2104 and/or truck-2102 are made from a non-metallicmaterial. For instance, in one embodiment energy storage member 2104 isan injection molded plastic member. Likewise truck 2102 can be injectionmolded. In various embodiments, the members are made from variousplastics, plastic composites, polymers, fiberglass, and othernon-metallic materials. Advantageously, using such non-metallic materialprovides a lightweight, low-cost, mass producible mechanism.

In some embodiments, mechanism 2100 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 22 shows a generally schematic representation of a mechanism 2200according to one embodiment. Mechanism 2200 includes a carriage or truck2202, an energy storage member 2204, and a cam 2206. Truck 2202 includesa shaft which moves within inner facing cam 2206, along a path ofmovement defined by an axis α. In this embodiment, energy storage member2204 is attached to truck 2202 and includes one or more arms 2210 whichincrease in force and energy as they move down along the cam surface.Cam followers 2212 are attached to one end of each of arms 2210 and areforced against the surface of cam 2206 by energy storage member 2204. Inone embodiment, cam followers 2212 include ball bearings.

In one embodiment, cam 2206 includes an overall tube shape having adiameter 2206 d of approximately one inch. Other embodiments includediameters of two inches, three inches, or greater. In some embodiments,cam 2206 has a length of approximately four inches. Other embodimentsinclude lengths of 6, 9, 12, 15, 20, 24 inches, and higher.

As the shaft of truck 2202 moves relative to cam 2206 along axis α, theenergy in member 2204 increases. In one embodiment, the shape of the cam2206 provides a constant supporting force in the direction parallel toaxis α. Some embodiments provide a pre-determined variable force.

In one embodiment, the lower portion of the shaft includes a seal and agas is located within cam 2206 to provide a damping force or additionalsupporting force.

In some embodiments, mechanism 2200 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIGS. 23A and 23B show a generally schematic representation of amechanism 2300 according to one embodiment. Mechanism 2300 includes acarriage or truck 2302, an energy storage member 2304, and cams 2306 and2307.

Cams 2306 and 2307 include straight cam rails. The truck 2302 is coupledto or integral with at least one slider 2320 or 2321. First slider 2320includes bearings such as ball bearings or linear bearings 2330 andtranslates within cam 2307. Second slider 2321 includes bearings such asball bearings or linear bearings 2330 and translates within cam 2306. Inthis embodiment, energy storage member 2304 includes an extension springwhich is coupled at a first end to first slider 2320 and at a second endto second slider 2321.

Truck 2302 moves relative to cams 2306 and 2307 along a path defined byan axis α. As the truck moves, cams 2306 and 2307 cause energy storagemember 2304 to extend. In one embodiment, energy storage member 2304 isa non-linear spring chosen, in combination with the configuration ofcams 2306 and 2307, to provide a constant counterbalance force in adirection parallel to the axis α. In some embodiments, a pre-determinedvariable force is provided.

In some embodiments, mechanism 2300 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 24A shows a generally schematic representation of a mechanism 2400according to one embodiment. Mechanism 2400 includes a carriage or truck2402, an energy storage member 2404, and cams 2406 and 2407.

Cams 2406 and 2407 include straight cam rails. The truck 2402 is coupledto or integral with at least one slider 2420 or 2421. First slider 2420includes ball bearings and translates against cam 2407. Second slider2421 includes ball bearings and translates against cam 2406. In thisembodiment, energy storage member 2404 includes a compression springwhich is coupled at a first end to first slider 2420 and at a second endto second slider 2421. In one embodiment, a second spring 2404′ isadded. In one embodiment, all members of mechanism 2400 are manufacturedfrom steel, providing a sturdy, cost-effective mechanism.

Truck 2402 moves relative to cams 2406 and 2407 along a path defined byan axis α. As the truck moves, cams 2406 and 2407 cause energy storagemember 2404 (and 2404′) to compress. In one embodiment, energy storagemember 2404 is a non-linear spring chosen, in combination with theconfiguration of cams 2406 and 2407 to provide a constant counterbalanceforce in a direction parallel to the axis α. In some embodiments, apre-determined variable force is provided.

In some embodiments, mechanism 2400 includes one or more of the featuresof other mechanisms described above and below. Accordingly, the detailsand features described in the other embodiments are incorporated hereinby reference.

FIG. 24B shows a generally schematic representation of a mechanism 2400′according to one embodiment. Mechanism 2400′ is generally similar tomechanism 2400. In one embodiment, mechanism 2400′ includes parallelrails 2420 and 2421 and bearings 2440 for guiding a truck 2402′.Mechanism 2400′ also includes internally mounted cam 2406′ and 2407′ forproviding a force form energy storage member 2404. In FIG. 24B, thetruck is in an upper position at point A and in a lower position atpoint B.

In some embodiments, mechanism 2400′ includes one or more of thefeatures of other mechanisms described above and below. Accordingly, thedetails and features described in the other embodiments are incorporatedherein by reference.

FIG. 24C shows a rail 2450 according to one embodiment. Rail 2450includes a pair of parallel linear rails 2451 and 2452. A bottom surface2453 is angled relative to the linear rails 2451 and 2452, thusproviding a camming surface as cam followers 2454 and energy storagemembers 2455 travel along the rail. For example, a truck or carriage iscoupled to cam followers 2454 and translates along the rail from a firstpoint A to a second point B.

FIG. 25 shows a side view of a combination monitor support and energystorage member 2500 according to one embodiment. This example shows thatsome embodiments can provide a tilting or curved path for a componentsuch as monitor 2501. For example, members 1104 a and 1104 b of FIG. 11Acould be curved as shown in FIG. 25.

FIG. 26 shows an adjustment mechanism 2602 for adjusting for variableloads on one or more of the support mechanisms described herein. Here amechanism includes rotating cams 2604 having pivot points 2605.Adjusting mechanism 2602 provides a force on one or both cams to rotatethem to provide a different cam surface profile. In one embodiment,mechanism 2602 includes a screw for manual adjustment. In oneembodiment, mechanism 2602 includes a spring. This provides forautomatic adjustment of the cam profiles. Other embodiments include botha spring and a screw.

FIG. 27 shows an adjustment mechanism 2702 for adjusting for variableloads on one or more of the support mechanisms described herein.Adjusting mechanism 2702 provides a force on one or both cams 2705 torotate them about a pivot point to provide a different cam surfaceprofile. In one embodiment, mechanism 2702 includes a ratchet mechanism2704 for locking the cams in position. A user can adjust the ratchet tocontrol the cam angles and profiles. In one embodiment, the cam includesa linkage slot instead of a pivot point to provide other cam profiles(i.e., the top of the cam can be moved also).

FIG. 28 shows a mechanism 2800 which includes an adjustment mechanism2802 according to one embodiment. In one embodiment, adjusting mechanism2802 moves the cams 2806 together or apart. Adjustment mechanism 2802includes a first sprocket 2808 which rotates a threaded shaft 2809 whichadjusts the distance between the cams. A chain 2814 connects firstsprocket 2808 to a second sprocket 2810. Second sprocket 2802 is drivenby a knob 2812. Also attached to knob 2812 is a threaded shaft 2811which adjusts the distance between the cams. A user can rotate knob 2812to activate the adjustment mechanism. Some embodiments incorporate amotor for driving the adjustment mechanism. Similarly to FIG. 27, thecam can include a linkage slot instead of a pivot point 2820 to provideother cam profiles.

FIG. 29 shows a mechanism 2900 having an adjustment mechanism 2902 foradjusting for variable loads of one or more of the embodiments describedherein. Adjusting mechanism 2902 provides a force on leaf spring 2904 toadjust its pre-load force against cam 2906.

Examples of Supporting Monitors and other Computer Components

In some embodiments, the monitor support mechanisms described above areuseful for supporting and lifting a variety of monitors and computercomponents.

For instance, FIG. 30 shows a computer monitor support system 3010according to one embodiment. System 3010 includes a monitor 3020, akeyboard 3050, a work center support 3030, and a monitor supportmechanism 3040.

Support 3030 includes a base portion 3032 and an upper portion 3031.Upper portion 3031 is slidably coupled to the base portion. Monitor 3020and keyboard 3050 are attached to upper portion 3031. In thisembodiment, the sides of base portion 3032 provide a guide 3026 forkeeping upper portion 3031 straight as it is being raised or lowered.Drawer slides or other slides mentioned above may be used. Otheralternatives for work centers are within the scope of the presentembodiment.

Monitor support mechanism 3040 is coupled between upper section 3031 andlower section 3032 to provide support and adjustability of upper section3031 relative to lower section 3032. Mechanism 3040 generally includes acarriage or truck 3042 which is attached to upper section 3031 andtranslates within guide 3026, and a cam 3041 which is coupled to lowersection 3032. Cam 3041 includes two outwardly facing cam surfaces 3043and 3044.

When a downward force is applied to upper section 3031, the force istransferred via the truck to cam followers 3034 which are forced againstcam 3041 by an energy storage member, such as a spring 3035. Truck 3042then moves within the guide. The cam provides an opposing, supportingforce on upper section 3031 via the cam followers and spring 3035. Inone embodiment, the cam is shaped so that it provides a constantcounterbalance force independent of the position of the cam followersalong the cam, thus providing a simple system of adjusting andmaintaining the position of the monitor and/or keyboard.

Advantageously, the cam surfaces 3043 and 3044 are generally verticallyoriented while spring 3035 applies a force in a horizontal direction.This configuration allows for a long run of the monitor 3020 relative tosupport 3032. In one embodiment, a run of 24 inches is provided. Oneembodiment provides a run of 36 inches. One embodiment provides a run oflonger than 36 inches.

In another embodiment, FIGS. 31A and 31B show a front and side view,respectively, of another exemplary use of a monitor support mechanism.In FIGS. 31A and 31B, a monitor support mechanism 3100 is used in 20inch vertical data entry station having a flat panel monitor 3102 and akeyboard 3103 coupled to a support 3101. In other embodiments, the othermonitor support mechanisms discussed above can be used in place ofmonitor support mechanism 3100.

As noted above, in some embodiments all the moving components of themechanism (i.e., the pivot arms, the spring, the truck, the camfollowers) move in the same general plane of motion. This provides thatthe mechanism can be manufactured to be a relatively thin mechanism.This advantage can be seen in FIG. 311B which shows schematically howclose to the wall the mechanism permits the monitor and keyboard to be.In one embodiment, the mechanism permits a monitor to be mounted nogreater than 4 inches from a wall. Other embodiments provide variousother distances.

In one or more embodiments, several of the components, such as thetruck, the bearings and the cams, can be formed of lightweight material.In another option, the mating surfaces of the components can be formedto provide a smooth surface, where a lesser frictional force would occuras the components move relative to one another. Other variations ofmaterials include, for example, thermoformed plastic.

The embodiments discussed above are scalable. In other words, one ormore embodiments of the present invention are not limited by therelative size, force, or weight ranges of the mechanisms. The principlebehind the present embodiments is applicable to smaller and largermechanism than those depicted as examples. Moreover, one or morefeatures described above may be combined or substituted in otherembodiments.

Additional Examples of Uses

In some embodiments, mechanisms as described above can be incorporatedinto furniture systems for providing support and adjustability; otherembodiments incorporate the mechanisms above in exercise equipment forproviding an opposing force against a user's load; some embodiments areincorporated into robotics, military equipment, automobile windows, andother equipment which utilizes a lifting or supporting force.

Examples of Furniture Systems

FIG. 32 shows a worktable 3210 constructed in accordance with oneembodiment. The features presented are applicable to a wide range offurniture, including children's desks, for example.

Worktable 3210 includes a main body 3220 and a mechanism 3230. Main body3220 includes a first section 3222 and a second section 3224. Section3222 includes a work surface or support surface 3225. Second section3224 is a base section for supporting the first section 3222. Firstsection 3222 is, in one option, slidably coupled with second section3224 along a guide 3226, which comprises an inner surface of a verticalportion 3228 of second section 3224. Alternatively, first section 3222can be coupled to an outer portion of vertical portion 3228. Otheralternatives for worktables are within the scope of the presentembodiment.

Mechanism 3230 is coupled between first section 3222 and second section3224 to provide support and adjustability of first section 3222 relativeto second section 3224. Mechanism 3230 generally includes a truck 3231which is attached to first section 3222 and translates within guide3226, and a cam 3232 which is coupled to second section 3224.Alternatively, the truck can be attached to second section 3224 and thecam can be attached to first section 3222. When a downward force isapplied to first section 3222, the force is transferred via the truck3231 to cam followers 3234. Truck 3231 moves within the guide 3226. Thecams 3232 provide an opposing, supporting force on first section 3222via the cam followers 3234.

Mechanism 3230 includes one or more features of the mechanism discussedabove. In one embodiment, it provides a constant vertical force,allowing a user to quickly and easily adjust the height of the tablesurface. Some embodiments include an adjustment mechanism as describedabove so a user can adjust the overall strength of the mechanismdepending on the load.

FIG. 33A shows an adjustable shelf 3300 according to one embodiment.Shelf 3300 includes a mechanism 3330, a first section 3322, and a secondsection 3324. Section 3322 includes a work surface or support surface3325. Second section 3324 is a base section for supporting the firstsection 3322. First section 3322 is, in one option, slidably coupledwith second section 3324 along a guide 3326, which comprises an innersurface of a vertical portion of second section 3324.

Mechanism 3330 is coupled between first section 3322 and second section3324 to provide support and adjustability of first section 3322 relativeto second section 3324. In this embodiment, an energy storage member3340 is compressed by a cam via one or more cam followers as the worksurface 3325 descends.

Mechanism 3330 includes one or more features of the mechanism discussedabove. In one embodiment, it provides a constant vertical force,allowing a user to quickly and easily adjust the height of the shelfsurface. Some embodiments include an adjustment mechanism as describedabove so a user can adjust the overall strength of the mechanismdepending on the load.

FIG. 33B shows adjustable shelf 3300 of FIG. 33A according to anotherembodiment. In this embodiment, the energy storage member is integral orcoupled with the cam and the cam is deflected or displaced as worksurface 3325 descends.

Advantageously, the furniture support systems described above are aconvenient, cost effective, and reliable way to adjust the position orprovide support for furniture.

Examples of Exercise Machine Systems

FIG. 34 shows an exercise machine 3410. In this embodiment, exercisemachine 3410 is a rowing machine. However, the features presented areapplicable to a wide range of exercise equipment, such as, but notlimited to, weight lifting equipment.

Exercise machine 3410 includes a main body 3420, an interface member3430, and a force mechanism 3400. Main body 3420 includes a seat 3422which is slidably coupled to main body 3420 within a guide 3423. Mainbody 3420 also includes a pair of legs 3424 and a pair of footrests3425. Other alternatives for main body 3420 are within the scope of thepresent embodiment.

Interface member 3430 provides a user-controlled connection between theuser and force mechanism 3400. Interface member 3430 generally includesa central portion 3437 which is attached to main body 3420 and acoupling portion 3431 which is coupled to mechanism 3400 at a first end3433. Member 3430 also includes an actuating member 3435, which isrotatably coupled to central portion 3437 so that when actuating member3435 is rotated, a member 3434 which is attached to actuating member3435 applies a force on a second end of coupling member 3431 which istransferred via the coupling member to mechanism 3400. Exercise machine3410 also includes a pair of handles 3436 at the ends of actuatingmembers 3435 for a user to grip and pull on the actuating members.

Mechanism 3400 is attached to main body 3400 and includes a truck 3490which is coupled to coupling member 3431. When a user pulls on handles3436, actuating member 3435 is rotated. This in turn applies a force viacoupling member 3431 to truck 3490. Truck 3490 then moves within a guideof mechanism 3400 as described above. Mechanism 3400 then provides anopposing force to the force applied by the user. As discussed above, inone embodiment, mechanism 3400 provides a constant resistive force asthe truck slides along the guide.

As discussed above, mechanism 3400 provides a slim, simple, adjustable,resistive force mechanism for exercise equipment such as exercisemachine 3410.

One or more embodiments described above are useful for providingopposing, resistive force for a variety of exercise machines.

FIG. 35 shows a front view of an exercise machine 3510 in accord withone embodiment. In this embodiment, the exercise machine is a benchpress system. However, as noted above in regards to FIG. 34, thefeatures presented are applicable to a wide range of exercise equipment.

Exercise machine 3500 includes a main body 3520, an interface member3530, and a force mechanism 3540. Main body 3520 includes a bench 3522which is coupled to main body 3520. Main body 3520 also includes supportlegs 3524. Other alternatives for main body 3520 are well known in theart and are within the scope of the present embodiment.

Interface member 3530 provides a user-controlled connection between theuser and force mechanism 3540. Interface member 3530 generally includesa central portion 3537 which is slidably coupled to main body 3520 alonga support guide 3525, and a coupling portion 3531 which is coupled tomechanism 3540. Member 3530 also includes an actuating member 3535,which is coupled to central portion 3537 so that when actuating member3535 is pushed by the user, it provides a force on coupling member 3531which is transferred via the coupling member to mechanism 3540. Exercisemachine 3540 also includes a pair of handles 3536 at the ends ofactuating members 3535 for a user to grip and push on the actuatingmembers.

Mechanism 3540 is attached to main body 3524 and includes a truck 3590which is coupled to coupling member 3531. When a user pushes on handles3536, actuating member 3535 is raised. This in turn applies a force viacoupling member 3531 to truck 3590. Truck 3590 then moves within a guideof mechanism 3540 as described above. Mechanism 3540 then provides anopposing force to the force applied by the user. In other embodiments,the other mechanisms discussed above can be used in place of mechanism3540.

As noted above, in one embodiment, the present system is incorporatedinto a robotics system. For instance, one or more mechanisms can beincorporated into dummies or mannequins used for firearm or artillerypractice for the police or armed forces. In one example, a mechanismprovides the lifting force needed to raise such a dummy after it hasbeen “shot.” Since the present system provides a stored energy force,the mechanism can be driven by a small motor, thus decreasing the sizeand cost of the overall system.

Conclusion

There is a need for a monitor support mechanism which is compact, lesscostly to manufacture and maintain, has increased reliability, allowseasy adjustability, is scalable to many different sized monitors, isadaptable to provide a long range of travel, and is adaptable to provideconstant support force as the monitor is being positioned.

Accordingly, the present inventors devised methods, systems, andmechanisms for providing force and position control on a monitor. In oneembodiment, a method of supporting a monitor includes converting anascending energy storage member force curve into a substantiallyconstant supporting force against the monitor.

In one aspect, a method of supporting a monitor includes providing anenergy storage member and a cam which are cooperatively positioned so asto move relative to each other along the path of motion. As the energystorage member moves along the path relative to the cam, the camdisplaces the energy storage member and thereby changes a force appliedby the energy storage member on the cam, and wherein the cam convertsthe force applied by the energy storage member into a supporting forceon the monitor.

One aspect provides a monitor support mechanism. In one embodiment, amonitor support mechanism includes an energy storage member and a cam.The energy storage member and the cam are cooperatively positioned sothat, as the energy storage member moves along a path relative to thecam, the cam displaces the energy storage member and thereby changes aforce of the energy storage member, and wherein the cam converts theforce of the energy storage member into a substantially constantsupporting force on the monitor.

During one example use of the mechanism, the height, location, and/orhorizontal position of a component mounted on the mechanism can beadjusted. For example, to move the monitor, a portion of the truck orthe monitor is grasped, and force is applied to overcome the frictionalrestraint of the components, which can be as little as 1 or 2 pounds, byway of example. When the moving force is removed, the component remainssupported in its new position. Thus, even very large loads can be safelyand easily adjusted with a minimum of effort.

Moreover, in one or more embodiments, a constant level of energy isstored (or expended) by the energy storage member per unit of movementalong the path. This provides ease of adjustment all along the path.

Among other advantages, the present monitor support system providesmechanisms which can be compact, scalable, have a long range of travel,and have a slim profile. In addition, the monitor support mechanisms arelow cost and light weight. A further benefit is when multiple componentsare simultaneously secured with the same mechanism to achieve anefficient use of space and provide common movement of the components. Inone embodiment, a single mechanism can be changed or adjusted to allowvarious weight components to be counterbalanced by the same mechanism.Moreover, the present invention is not limited by the relative size ofthe mechanisms. The principle behind the present embodiments isapplicable to smaller and larger mechanism than those depicted asexamples. Moreover, one or more features described above may be combinedor substituted in other embodiments.

Other variations of materials include, for example, thermoformedplastic. This provides a low cost mass-producible item.

Moreover, one or more embodiments of the mechanism described above canbe used for many different applications. For example, computer monitors,keyboards, furniture, or exercise equipment.

It is to be understood that the above description is intended to beillustrative, and not restrictive. Many other embodiments will beapparent to those of skill in the art upon reading and understanding theabove description. It should be noted that embodiments discussed indifferent portions of the description or referred to in differentdrawings can be combined to form additional embodiments of the presentinvention. The scope of the invention should, therefore, be determinedwith reference to the appended claims, along with the full scope ofequivalents to which such claims are entitled.

1-49. (canceled)
 50. A method of supporting a monitor which is movablealong a path of motion, the method comprising: providing an energystorage member and a cam which are cooperatively disposed so as to moverelative to each other thereby defining the path, wherein as the energystorage member moves relative to the cam, the energy storage memberapplies a varying first force in a generally normal direction againstthe cam, and wherein the cam converts said first force into asubstantially constant supporting force in the direction of the path onthe monitor.
 51. The method of claim 50, wherein the cam has a generallyvertical orientation relative to the path.
 52. The method of claim 50,wherein the energy storage member applies the first force in a generallylateral direction relative to the path.
 53. The method of claim 50,wherein as the energy storage member moves, the cam displaces the energystorage member at a different rate than a rate of travel by the energystorage member along the path.
 54. A monitor support mechanismcomprising: an energy storage member; and a cam; wherein, the energystorage member and the cam are cooperatively positioned so that, as theenergy storage member moves along a path relative to the cam, the camdisplaces the energy storage member and thereby changes a force of theenergy storage member, and wherein the cam converts the force of theenergy storage member into a substantially constant supporting force onthe monitor.
 55. The monitor support mechanism of claim 54, wherein thesupporting force is parallel to the path.
 56. The monitor supportmechanism of claim 54, wherein as the energy storage member moves alongthe path, the cam displaces the energy storage member at a differentrate than a rate of travel by the energy storage member along the path.57. The monitor support mechanism of claim 54, wherein the cam isoriented so that the cam runs in a direction generally alongside thepath of motion.
 58. The monitor support mechanism of claim 54, whereinthe energy storage member is positioned so that the force applied by theenergy storage member is oriented in a direction non-parallel to thepath.
 59. A monitor support mechanism for supporting the monitor whichis movable along a path of motion, the monitor support mechanismcomprising: a cam having a cam surface; a cam follower for riding alongthe cam surface; and an energy storage member for providing a forceagainst the cam follower in a direction which is non-parallel to thepath, wherein the cam follower transfers said force to the cam surfacein a direction which is non-parallel to the path; wherein said camsurface converts said force into a first reaction force component whichis parallel to the path and a second reaction force component which isperpendicular to the first reaction force, wherein as the energy storagemember moves relative to the cam along the path, said energy storagemember force varies, and wherein the first reaction force componentprovides a substantially constant supporting force on the monitor as theenergy storage member force varies.
 60. The monitor support mechanism ofclaim 59, wherein the cam surface has a generally vertical orientation.61. The monitor support mechanism of claim 59, wherein the energystorage member is positioned so that the force applied by the energystorage member is oriented in a direction non-parallel to the path.